Two new future product pages popped up on Microchip’s site, the PIC18F45K50 and PIC18F25K50. These are pin, and probably register, compatible replacements for PIC18F4550, and PIC18F2550, which are Microchip’s most powerful 5V USB devices.
One thing we noticed is that the new PICs have high-precision self tuning oscillators, thus removing the need for crystals in USB operations, giving you 2 more pins to play with. The new devices are also expected to have more ADC channels, a 5bit DAC peripheral, two 16bit timers instead of one, and a Charge Time Measurement Unit. Other devices from the K series feature interrupt-on-change on most pins, but this hasn’t been specifically mentioned yet.
If the past is anything to go by, the K versions should be cheaper than the parts they replace. This will be very welcome, since the PIC18Fx550 parts are quite expensive compared to similar PIC24F, and PIC32 3.3V USB devices.
Via the forum.